Valve grinder



y 1933- F. H. ETZENHOUSER in AL 1,918,743

VALVE GRI NDER Filed May 9, 1930 Illa/l INVENTORS: Fred JLETzenhoasez P0567"? G. Murphy v H and Frank 2 122726131} Wiinew:

ATTORNEY Patented July 18, 1933 ram: H. ETzENnoUsnR,

PATENT {oFFIcE sonar 0. MURPHY, AND FRANK r. 'TANDY, or INDEPENDENCE, rrrssoum VALVE GRINDER Application filed May 9, 1930. Serial No. 451,040.

Our invention relates to valve grinders and our object is to provide a simple, inexpensive and efficient device of this character including a vacuum cup for rotating and lifting the 6 valve, and a centering element for centering said vacuum cup upon the valve.

By providing a vacuum cupthe valve may be rotated and lifted from time to time to change its general position on the seat with- 10 out using the spring generally employed for that purpose, and by providing the centering element the vacuum cup is centered upon and prevented from slipping sidewise off the valve.

In order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Fig. 1 is a broken side elevation, partly in section of the tool in position for grinding a valve.

Fig. 2 is an inverted plan view of the valve.

Fig. 3 is a detail perspective View of a centering device employed in carrying out the invention.

Fig. 4 is a broken detail perspective view of the vacuum cup and the stem to which it is connected.

Referring in detail to the different parts, 2 designates a shank of suitable length which is provided at its upper end with a handle 4 and at its lower end with a vacuum cup 6. The vacuum cup 6 is made preferably of rubber or other resilient material and its reduced upper end is further secured to the shank 2 by means of a tubular retaining member 8.

10 designates a centering device loosely surrounding the vacuum cup 6 and consisting of metal or other suitable material. Said cen- 4 tering device 10 is of inverted cup-shaped form and provided at its upper end with an opening 12 for the reception of the retaining member 8 and has a large openingl l at its lower end for fitting over the valves of internal combustion engines.

' A coil spring 16 is interposed between a collar 18, fixed upon the shank 2, and the upper portion of the centering devicelO for pressing the, latter down on the cylinder 9 block B and assisting in lifting the vacuum cup 6 at intervals during the grinding operation. i

In practice the pin for retaining the usual valve spring (not shown) in place is removed and the centering device 10 is placed over the valve A and upon the top of the cylinder block B to center the vacuum cup 6 upon said valve. The vacuum cup 6 is then firmly pressed upon the valve A to exclude the air from the interior of said cup so that it will be held to the valve by atmospheric pressure in the well-known way. The valve may then, be rotated u on and raised from the seat C, as shown by ig. 1, every few turns to change. its general position on said seat.

By yieldably mounting the centering device 10 upon the cup 6 and the retaining element 8, the tool isrendered flexible and the shank 2 may be moved to various angular positions with respect to the plane of the 7 vacuum cup 6 and the centering device 10, for obtaining the best results in the grinding operation. As the opening 14 in the lower portion of the centering cup 10 is but slightly larger than the diameter of the valve A, it will coact with the latter in preventing" the vacuum cup 10 from slipping laterally out of position on said valve during the grinding operation.

From the foregoing description it will be understood that we have provided a valve grinder that is well adapted for the purpose intended and while we have shown one form of the invention we reserve all rights to such other forms and modifications as properly 8 fall within the spirit and scope of the inven tion as claimed.

Having thus described our invention, what we claim and desire to secure by Letters Patent, is:

1. A valve grinder consisting of a shank, a vacuum cup mounted upon said shank, and

a centering device loosely surrounding said vacuum cup to center the latter upon the valve and permit said shank to be moved to various angular positions with respect to the plane of the vacuum cup and said centering device.

2. A valve grinder consisting of a shank,

a vacuum cup mounted upon said shank, a

centering device loosely surrounding said vacuum cup and adapted to surround the valve being ground, and spring means pressing against said centering device and adapted to lift the vacuum cup.

3. A valve grinder consisting of a shank, a vacuum cup mounted upon said shank, and an inverted cup-shaped centering device loosely surrounding said vacuum cup and adapted to surround the valve being ground.

4. A valve grinder consisting of a shank provided at one end with a handle, a resilient vacuum cup mounted upon the other end of said shank, a centering element surrounding said vacuum cup, and adapted to surround element.

FRED H. ETZENHOUSER. ROBERT C. MURPHY. FRANK P. TANDY. 

